static void acpi_tb_setup_fadt_registers(void)
{
struct acpi_generic_address *target64;
struct acpi_generic_address *source64;
u8 pm1_register_byte_width;
u32 i;
if (acpi_gbl_use_default_register_widths) {
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
target64 =
ACPI_ADD_PTR(struct acpi_generic_address,
&acpi_gbl_FADT,
fadt_info_table[i].address64);
if ((target64->address) &&
(fadt_info_table[i].default_length > 0) &&
(fadt_info_table[i].default_length !=
target64->bit_width)) {
ACPI_WARNING((AE_INFO,
"Invalid length for %s: %d, using default %d",
fadt_info_table[i].name,
target64->bit_width,
fadt_info_table[i].
default_length));
target64->bit_width =
fadt_info_table[i].default_length;
}
}
}
pm1_register_byte_width = (u8)
ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width);
for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) {
source64 =
ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
fadt_pm_info_table[i].source);
if (source64->address) {
acpi_tb_init_generic_address(fadt_pm_info_table[i].
target, source64->space_id,
pm1_register_byte_width,
source64->address +
(fadt_pm_info_table[i].
register_num *
pm1_register_byte_width));
}
}
}
static void acpi_tb_convert_fadt(void)
{
struct acpi_generic_address *address64;
u32 address32;
u32 i;
acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
if (!acpi_gbl_FADT.Xfacs) {
acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
} else if (acpi_gbl_FADT.facs &&
(acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) {
ACPI_WARNING((AE_INFO,
"32/64 FACS address mismatch in FADT - two FACS tables!"));
}
if (!acpi_gbl_FADT.Xdsdt) {
acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt;
} else if (acpi_gbl_FADT.dsdt &&
(acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) {
ACPI_WARNING((AE_INFO,
"32/64 DSDT address mismatch in FADT - two DSDT tables!"));
}
if (acpi_gbl_FADT.header.revision < FADT2_REVISION_ID) {
acpi_gbl_FADT.preferred_profile = 0;
acpi_gbl_FADT.pstate_control = 0;
acpi_gbl_FADT.cst_control = 0;
acpi_gbl_FADT.boot_flags = 0;
}
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
address32 = *ACPI_ADD_PTR(u32,
&acpi_gbl_FADT,
fadt_info_table[i].address32);
address64 = ACPI_ADD_PTR(struct acpi_generic_address,
&acpi_gbl_FADT,
fadt_info_table[i].address64);
if (address64->address && address32 &&
(address64->address != (u64) address32)) {
ACPI_ERROR((AE_INFO,
"32/64X address mismatch in %s: %8.8X/%8.8X%8.8X, using 32",
fadt_info_table[i].name, address32,
ACPI_FORMAT_UINT64(address64->address)));
}
if (address32) {
acpi_tb_init_generic_address(address64,
ACPI_ADR_SPACE_SYSTEM_IO,
*ACPI_ADD_PTR(u8,
&acpi_gbl_FADT,
fadt_info_table
[i].length),
(u64) address32);
}
}
}
static void acpi_tb_setup_fadt_registers(void)
{
struct acpi_generic_address *target64;
struct acpi_generic_address *source64;
u8 pm1_register_byte_width;
u32 i;
/*
* Optionally check all register lengths against the default values and
* update them if they are incorrect.
*/
if (acpi_gbl_use_default_register_widths) {
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
target64 =
ACPI_ADD_PTR(struct acpi_generic_address,
&acpi_gbl_FADT,
fadt_info_table[i].address64);
/*
* If a valid register (Address != 0) and the (default_length > 0)
* (Not a GPE register), then check the width against the default.
*/
if ((target64->address) &&
(fadt_info_table[i].default_length > 0) &&
(fadt_info_table[i].default_length !=
target64->bit_width)) {
ACPI_BIOS_WARNING((AE_INFO,
"Invalid length for FADT/%s: %u, using default %u",
fadt_info_table[i].name,
target64->bit_width,
fadt_info_table[i].
default_length));
/* Incorrect size, set width to the default */
target64->bit_width =
fadt_info_table[i].default_length;
}
}
}
/*
* Get the length of the individual PM1 registers (enable and status).
* Each register is defined to be (event block length / 2). Extra divide
* by 8 converts bits to bytes.
*/
pm1_register_byte_width = (u8)
ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width);
/*
* Calculate separate GAS structs for the PM1x (A/B) Status and Enable
* registers. These addresses do not appear (directly) in the FADT, so it
* is useful to pre-calculate them from the PM1 Event Block definitions.
*
* The PM event blocks are split into two register blocks, first is the
* PM Status Register block, followed immediately by the PM Enable
* Register block. Each is of length (pm1_event_length/2)
*
* Note: The PM1A event block is required by the ACPI specification.
* However, the PM1B event block is optional and is rarely, if ever,
* used.
*/
for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) {
source64 =
ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
fadt_pm_info_table[i].source);
if (source64->address) {
acpi_tb_init_generic_address(fadt_pm_info_table[i].
target, source64->space_id,
pm1_register_byte_width,
source64->address +
(fadt_pm_info_table[i].
register_num *
pm1_register_byte_width),
"PmRegisters");
}
}
}
static void acpi_tb_convert_fadt(void)
{
char *name;
struct acpi_generic_address *address64;
u32 address32;
u8 length;
u32 i;
/*
* For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
* should be zero are indeed zero. This will workaround BIOSs that
* inadvertently place values in these fields.
*
* The ACPI 1.0 reserved fields that will be zeroed are the bytes located
* at offset 45, 55, 95, and the word located at offset 109, 110.
*
* Note: The FADT revision value is unreliable. Only the length can be
* trusted.
*/
if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) {
acpi_gbl_FADT.preferred_profile = 0;
acpi_gbl_FADT.pstate_control = 0;
acpi_gbl_FADT.cst_control = 0;
acpi_gbl_FADT.boot_flags = 0;
}
/*
* Now we can update the local FADT length to the length of the
* current FADT version as defined by the ACPI specification.
* Thus, we will have a common FADT internally.
*/
acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
/*
* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary.
* Later ACPICA code will always use the X 64-bit field.
*/
acpi_gbl_FADT.Xfacs = acpi_tb_select_address("FACS",
acpi_gbl_FADT.facs,
acpi_gbl_FADT.Xfacs);
acpi_gbl_FADT.Xdsdt = acpi_tb_select_address("DSDT",
acpi_gbl_FADT.dsdt,
acpi_gbl_FADT.Xdsdt);
/* If Hardware Reduced flag is set, we are all done */
if (acpi_gbl_reduced_hardware) {
return;
}
/* Examine all of the 64-bit extended address fields (X fields) */
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
/*
* Get the 32-bit and 64-bit addresses, as well as the register
* length and register name.
*/
address32 = *ACPI_ADD_PTR(u32,
&acpi_gbl_FADT,
fadt_info_table[i].address32);
address64 = ACPI_ADD_PTR(struct acpi_generic_address,
&acpi_gbl_FADT,
fadt_info_table[i].address64);
length = *ACPI_ADD_PTR(u8,
&acpi_gbl_FADT,
fadt_info_table[i].length);
name = fadt_info_table[i].name;
/*
* Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
* generic address structures as necessary. Later code will always use
* the 64-bit address structures.
*
* November 2013:
* Now always use the 64-bit address if it is valid (non-zero), in
* accordance with the ACPI specification which states that a 64-bit
* address supersedes the 32-bit version. This behavior can be
* overridden by the acpi_gbl_use32_bit_fadt_addresses flag.
*
* During 64-bit address construction and verification,
* these cases are handled:
*
* Address32 zero, Address64 [don't care] - Use Address64
*
* Address32 non-zero, Address64 zero - Copy/use Address32
* Address32 non-zero == Address64 non-zero - Use Address64
* Address32 non-zero != Address64 non-zero - Warning, use Address64
*
* Override: if acpi_gbl_use32_bit_fadt_addresses is TRUE, and:
* Address32 non-zero != Address64 non-zero - Warning, copy/use Address32
*
* Note: space_id is always I/O for 32-bit legacy address fields
*/
if (address32) {
if (!address64->address) {
/* 64-bit address is zero, use 32-bit address */
acpi_tb_init_generic_address(address64,
ACPI_ADR_SPACE_SYSTEM_IO,
*ACPI_ADD_PTR(u8,
&acpi_gbl_FADT,
fadt_info_table
[i].
length),
(u64)address32,
name);
} else if (address64->address != (u64)address32) {
/* Address mismatch */
ACPI_BIOS_WARNING((AE_INFO,
"32/64X address mismatch in FADT/%s: "
"0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
name, address32,
ACPI_FORMAT_UINT64
(address64->address),
acpi_gbl_use32_bit_fadt_addresses
? 32 : 64));
if (acpi_gbl_use32_bit_fadt_addresses) {
/* 32-bit address override */
acpi_tb_init_generic_address(address64,
ACPI_ADR_SPACE_SYSTEM_IO,
*ACPI_ADD_PTR
(u8,
&acpi_gbl_FADT,
fadt_info_table
[i].
length),
(u64)
address32,
name);
}
}
}
/*
* For each extended field, check for length mismatch between the
* legacy length field and the corresponding 64-bit X length field.
* Note: If the legacy length field is > 0xFF bits, ignore this
* check. (GPE registers can be larger than the 64-bit GAS structure
* can accomodate, 0xFF bits).
*/
if (address64->address &&
(ACPI_MUL_8(length) <= ACPI_UINT8_MAX) &&
(address64->bit_width != ACPI_MUL_8(length))) {
ACPI_BIOS_WARNING((AE_INFO,
"32/64X length mismatch in FADT/%s: %u/%u",
name, ACPI_MUL_8(length),
address64->bit_width));
}
if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) {
/*
* Field is required (Pm1a_event, Pm1a_control).
* Both the address and length must be non-zero.
*/
if (!address64->address || !length) {
ACPI_BIOS_ERROR((AE_INFO,
"Required FADT field %s has zero address and/or length: "
"0x%8.8X%8.8X/0x%X",
name,
ACPI_FORMAT_UINT64(address64->
address),
length));
}
} else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) {
/*
* Field is optional (Pm2_control, GPE0, GPE1) AND has its own
* length field. If present, both the address and length must
* be valid.
*/
if ((address64->address && !length) ||
(!address64->address && length)) {
ACPI_BIOS_WARNING((AE_INFO,
"Optional FADT field %s has zero address or length: "
"0x%8.8X%8.8X/0x%X",
name,
ACPI_FORMAT_UINT64
(address64->address),
length));
}
}
}
}
static void acpi_tb_convert_fadt(void)
{
struct acpi_generic_address *address64;
u32 address32;
u32 i;
/*
* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary.
* Later code will always use the X 64-bit field. Also, check for an
* address mismatch between the 32-bit and 64-bit address fields
* (FIRMWARE_CTRL/X_FIRMWARE_CTRL, DSDT/X_DSDT) which would indicate
* the presence of two FACS or two DSDT tables.
*/
if (!acpi_gbl_FADT.Xfacs) {
acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
} else if (acpi_gbl_FADT.facs &&
(acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) {
ACPI_WARNING((AE_INFO,
"32/64 FACS address mismatch in FADT - two FACS tables!"));
}
if (!acpi_gbl_FADT.Xdsdt) {
acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt;
} else if (acpi_gbl_FADT.dsdt &&
(acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) {
ACPI_WARNING((AE_INFO,
"32/64 DSDT address mismatch in FADT - two DSDT tables!"));
}
/*
* For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
* should be zero are indeed zero. This will workaround BIOSs that
* inadvertently place values in these fields.
*
* The ACPI 1.0 reserved fields that will be zeroed are the bytes located
* at offset 45, 55, 95, and the word located at offset 109, 110.
*
* Note: The FADT revision value is unreliable. Only the length can be
* trusted.
*/
if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) {
acpi_gbl_FADT.preferred_profile = 0;
acpi_gbl_FADT.pstate_control = 0;
acpi_gbl_FADT.cst_control = 0;
acpi_gbl_FADT.boot_flags = 0;
}
/* Update the local FADT table header length */
acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
/*
* Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
* generic address structures as necessary. Later code will always use
* the 64-bit address structures.
*
* March 2009:
* We now always use the 32-bit address if it is valid (non-null). This
* is not in accordance with the ACPI specification which states that
* the 64-bit address supersedes the 32-bit version, but we do this for
* compatibility with other ACPI implementations. Most notably, in the
* case where both the 32 and 64 versions are non-null, we use the 32-bit
* version. This is the only address that is guaranteed to have been
* tested by the BIOS manufacturer.
*/
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
address32 = *ACPI_ADD_PTR(u32,
&acpi_gbl_FADT,
fadt_info_table[i].address32);
address64 = ACPI_ADD_PTR(struct acpi_generic_address,
&acpi_gbl_FADT,
fadt_info_table[i].address64);
/*
* If both 32- and 64-bit addresses are valid (non-zero),
* they must match.
*/
if (address64->address && address32 &&
(address64->address != (u64)address32)) {
ACPI_BIOS_ERROR((AE_INFO,
"32/64X address mismatch in FADT/%s: "
"0x%8.8X/0x%8.8X%8.8X, using 32",
fadt_info_table[i].name, address32,
ACPI_FORMAT_UINT64(address64->
address)));
}
/* Always use 32-bit address if it is valid (non-null) */
if (address32) {
/*
* Copy the 32-bit address to the 64-bit GAS structure. The
* Space ID is always I/O for 32-bit legacy address fields
*/
acpi_tb_init_generic_address(address64,
ACPI_ADR_SPACE_SYSTEM_IO,
*ACPI_ADD_PTR(u8,
&acpi_gbl_FADT,
fadt_info_table
[i].length),
(u64) address32,
fadt_info_table[i].name);
}
}
}
static void __init acpi_tb_convert_fadt(void)
{
u8 pm1_register_length;
struct acpi_generic_address *target;
acpi_native_uint i;
/* Update the local FADT table header length */
acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
/* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary */
if (!acpi_gbl_FADT.Xfacs) {
acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
}
if (!acpi_gbl_FADT.Xdsdt) {
acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt;
}
/*
* For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
* should be zero are indeed zero. This will workaround BIOSs that
* inadvertently place values in these fields.
*
* The ACPI 1.0 reserved fields that will be zeroed are the bytes located at
* offset 45, 55, 95, and the word located at offset 109, 110.
*/
if (acpi_gbl_FADT.header.revision < 3) {
acpi_gbl_FADT.preferred_profile = 0;
acpi_gbl_FADT.pstate_control = 0;
acpi_gbl_FADT.cst_control = 0;
acpi_gbl_FADT.boot_flags = 0;
}
/*
* Expand the ACPI 1.0 32-bit V1.0 addresses to the ACPI 2.0 64-bit "X"
* generic address structures as necessary.
*/
for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) {
target =
ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT,
fadt_info_table[i].target);
/* Expand only if the X target is null */
if (!target->address) {
acpi_tb_init_generic_address(target,
*ACPI_ADD_PTR(u8,
&acpi_gbl_FADT,
fadt_info_table
[i].length),
(u64) * ACPI_ADD_PTR(u32,
&acpi_gbl_FADT,
fadt_info_table
[i].
source));
}
}
/*
* Calculate separate GAS structs for the PM1 Enable registers.
* These addresses do not appear (directly) in the FADT, so it is
* useful to calculate them once, here.
*
* The PM event blocks are split into two register blocks, first is the
* PM Status Register block, followed immediately by the PM Enable Register
* block. Each is of length (pm1_event_length/2)
*/
pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length);
/* The PM1A register block is required */
acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
pm1_register_length,
(acpi_gbl_FADT.xpm1a_event_block.address +
pm1_register_length));
/* Don't forget to copy space_id of the GAS */
acpi_gbl_xpm1a_enable.space_id =
acpi_gbl_FADT.xpm1a_event_block.space_id;
/* The PM1B register block is optional, ignore if not present */
if (acpi_gbl_FADT.xpm1b_event_block.address) {
acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
pm1_register_length,
(acpi_gbl_FADT.xpm1b_event_block.
address + pm1_register_length));
/* Don't forget to copy space_id of the GAS */
acpi_gbl_xpm1b_enable.space_id =
acpi_gbl_FADT.xpm1a_event_block.space_id;
}
}
